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Calculate the number 3840

NUMBERMANIA: Calculate the number 3840 using numbers [9, 5, 8, 4, 58, 685] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 9

The first user who solved this task is Nasrin 24 T.

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Two-timer

Mrs. Donnell said to her maid: "Oh Mary, I suspect that my husband is having an affair with his secretary."

"I don't believe it," Mary snapped: "you're just saying that to make me jealous."

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Motorcycle

In 1885, the world's first motorcycle, designed by Gottlieb Daimler, made its first significant test-run. Daimler's 17-year-old son, Paul, travelled from Cannstatt to Unterturkheim and back. Their “Reitwagen” had a wooden frame and wheels. A leather drive belt ran between the engine and large brass gears on the rear wheel. With no suspension on the wheels, the leather saddle gave a very uncomfortable ride, at a speed up to 12 km/hr. The single cylinder engine had a bore of 58mm, stroke of 100mm and a displacement of 264cc's. The engine gave 0.5hp at 700 rpm. Two very much smaller, spring-mounted outrigger wheels provided some stability. This was built as an experimental vehicle to test the new Daimler engine in a proof of concept, which was to power Daimler's first motorized carriage the following year.

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